000
FZPN03 KNHC 202100
HSFEP2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
2230 UTC THU JUL 20 2017

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS

SEAS GIVEN AS SIGNIFICANT WAVE HEIGHT...WHICH IS THE AVERAGE
HEIGHT OF THE HIGHEST 1/3 OF THE WAVES. INDIVIDUAL WAVES MAY BE
MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.

PAN PAN

E PACIFIC FROM THE EQUATOR TO 30N E OF 140W AND 03.4S TO THE
EQUATOR E OF 120W

SYNOPSIS VALID 1800 UTC THU JUL 20.
24 HOUR FORECAST VALID 1800 UTC FRI JUL 21.
48 HOUR FORECAST VALID 1800 UTC SAT JUL 22.

.WARNINGS.

.TROPICAL STORM GREG NEAR 14.2N 116.4W 1003 MB AT 2100 UTC JUL 
20 MOVING W OR 275 DEG AT 9 KT. MAXIMUM SUSTAINED WINDS 45 KT 
GUSTS 55 KT. TROPICAL STORM FORCE WINDS WITHIN 50 NM N 
SEMICIRCLE. SEAS 12 FT OR GREATER WITHIN 90 NM N SEMICIRCLE...60 
NM SE AND 30 NM SW QUADRANTS WITH SEAS TO 18 FT. ELSEWHERE 
WITHIN 90 NM OF CENTER WINDS 20 TO 33 KT. SEAS 8 TO 12 FT. 
REMAINDER OF AREA FROM 11N TO 18N BETWEEN 111W AND 120W WINDS 20 
KT OR LESS. SEAS TO 10 FT PRIMARILY IN MIXED SWELL. 
.24 HOUR FORECAST TROPICAL STORM GREG NEAR 14.9N 119.9W. MAXIMUM 
SUSTAINED WINDS 60 KT GUSTS 75 KT. TROPICAL STORM FORCE WINDS 
WITHIN 60 NM N SEMICIRCLE AND 30 NM S SEMICIRCLE. SEAS 12 FT OR 
GREATER WITHIN 150 NM NW AND 90 NM SE SEMICIRCLE WITH SEAS TO 21 
FT. ELSEWHERE WITHIN 180 NM NW AND 120 NM SE SEMICIRCLES OF 
CENTER WINDS 20 TO 33 KT. SEAS 8 TO 12 FT. REMAINDER OF AREA 
FROM 10N TO 19N BETWEEN 116W AND 125W WINDS 20 KT OR LESS. SEAS 
TO 10 FT PRIMARILY IN MIXED SWELL. 
.48 HOUR FORECAST HURRICANE GREG NEAR 15.8N 124.3W. MAXIMUM 
SUSTAINED WINDS 70 KT GUSTS 85 KT. TROPICAL STORM FORCE WINDS 
WITHIN 80 NM N SEMICIRCLE...60 NM SE AND 50 NM SW QUADRANTS. 
SEAS 12 FT OR GREATER WITHIN 150 NM OF CENTER WITH SEAS TO 24 
FT. ELSEWHERE WITHIN 180 NM OF CENTER WINDS 20 TO 33 KT. SEAS 8 
TO 12 FT. REMAINDER OF AREA BOUNDED BY 24N130W TO 19N120W TO 
13N118W TO 08N127W TO 24N130W WINDS 20 KT OR LESS. SEAS TO 11 FT 
PRIMARILY IN MIXED SWELL. 
.72 HOUR FORECAST HURRICANE GREG NEAR 16.0N 129.0W. MAXIMUM 
SUSTAINED WINDS 65 KT GUSTS 80 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST TROPICAL STORM GREG NEAR 16.3N 132.9W. MAXIMUM
SUSTAINED WINDS 55 KT GUSTS 65 KT.
.120 HOUR FORECAST TROPICAL STORM GREG NEAR 17.0N 136.0W.
MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT.

...TROPICAL STORM WARNING...

...TROPICAL STORM WARNING...
.TROPICAL STORM FERNANDA NEAR 18.2N 140.4W 998 MB AT 2100 UTC 
JUL 20 MOVING W OR 280 DEG AT 11 KT. MAXIMUM SUSTAINED WINDS 50 
KT GUSTS 60 KT. TROPICAL STORM FORCE WINDS WITHIN 80 NM NE... 60 
NM SE...50 NM SW AND 70 NM NW QUADRANTS. SEAS 12 FT OR GREATER 
WITHIN 120 NM NW AND SE QUADRANTS...150 NM NE AND 90 NM SW 
QUADRANTS WITH SEAS TO 19 FT. ELSEWHERE WITHIN 270 NM N AND 150 
NM S SEMICIRCLES OF CENTER WINDS 20 TO 33 KT. SEAS 8 TO 12 FT. 
REMAINDER FORECAST WATERS W OF LINE FROM 26N135W TO 17N135W TO 
13N140W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT PRIMARILY IN MIXED 
SWELL.
.24 HOUR FORECAST TROPICAL DEPRESSION FERNANDA NEAR 19.0N 
143.7W. MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT. SEAS 12 FT OR 
GREATER WITHIN 120 NM OF CENTER WITH SEAS TO 18 FT. ELSEWHERE 
WITHIN 150 NM OF CENTER WINDS 20 TO 33 KT. SEAS 8 TO 12 FT. 
REMAINDER FORECAST WATERS W OF LINE FROM 25N140W TO 20N136W TO 
18N140W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT PRIMARILY IN MIXED 
SWELL.
.48 HOUR FORECAST POST TROPICAL REMNANT LOW FERNANDA NEAR 20.2N 
147.3W. MAXIMUM SUSTAINED WINDS 25 KT GUSTS 35 KT. CONDITIONS W 
OF FORECAST WATERS.
.72 HOUR FORECAST POST TROPICAL REMNANT LOW FERNANDA NEAR 21.5N 
151.5W. MAXIMUM SUSTAINED WINDS 25 KT GUSTS 35 KT.
EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE.
.96 HOUR FORECAST POST TROPICAL REMNANT LOW FERNANDA NEAR 22.5N 
156.5W. MAXIMUM SUSTAINED WINDS 20 KT GUSTS 30 KT.
.120 HOUR FORECAST...DISSIPATED.

FORECAST WINDS IN AND NEAR ACTIVE TROPICAL CYCLONES SHOULD BE 
USED WITH CAUTION DUE TO UNCERTAINTY IN FORECAST TRACK...SIZE 
AND INTENSITY.

.SYNOPSIS AND FORECAST.

.POST TROPICAL CYCLONE EIGHT-E NEAR 13.3N 123.9W 1009 MB AT 2100 
UTC JUL 20 MOVING W SW OR 240 DEG AT 6 KT. WINDS 20 TO 25 KT 
WITHIN 120 NM OF CENTER. SEAS TO 10 FT WITHIN 360 NM N AND 180 
NM S SEMICIRCLES OF CENTER. 
.24 HOUR FORECAST POST TROPICAL REMNANT LOW EIGHT-E NEAR 11.9N 
125.3W. WINDS 20 TO 25 KT WITHIN 90 NM SE QUADRANT OF LOW. SEAS 
TO 10 FT IN MIXED SWELL WITHIN 150 NM OF CENTER.  
.48 HOUR FORECAST POST TROPICAL REMNANT LOW EIGHT E NEAR 11.5N 
126.5W. CONDITIONS MERGE.
.72 HOUR FORECAST...DISSIPATED.

.LOW PRES NEAR 12N106W 1008 MB. NE TO E WINDS 20 TO 30 KT WITHIN 
270 NM NE QUADRANT OF LOW. SEAS TO 10 FT. ELSEWHERE WITHIN 420 
NM OF LOW WINDS 20 KT OR LESS. SEAS TO 9 FT PRIMARILY IN SW 
SWELL.
.24 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR 
13N110W 1008 MB. WITHIN 180 NM E SEMICIRCLE OF LOW SE TO S WINDS 
20 TO 30 KT. SEAS 9 TO 11 FT. ELSEWHERE WITHIN 300 NM E AND 180 
NM W SEMICIRCLES OF LOW WINDS 20 KT OR LESS. SEAS TO 9 FT 
PRIMARILY IN SW SWELL.
.48 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR 
14.5N113W 1006 MB. WITHIN 150 NM E AND 60 NM W SEMICIRCLES OF 
LOW WINDS 20 TO 30 KT. SEAS 8 TO 11 FT.  ELSEWHERE WITHIN 300 NM 
E AND 180 NM W SEMICIRCLES OF LOW WINDS 20 KT OR LESS. SEAS TO 9 
FT PRIMARILY IN SW SWELL.

.WITHIN 45 NM EITHER SIDE OF LINE FROM 16N95W TO 13.5N96W... 
INCLUDING THE GULF OF TEHUANTEPEC...WINDS 20 KT OR LESS.
SEAS TO 8 FT IN MIXED NE AND SW SWELL.
.12 HOUR FORECAST WITHIN 45 NM EITHER SIDE OF LINE FROM 16N95W 
TO 13N95W...INCLUDING THE GULF OF TEHUANTEPEC...WINDS 20 KT OR 
LESS. SEAS TO 8 FT IN MIXED NE AND SW SWELL.
.24 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.WITHIN 90 NM OF 10N88W WINDS 20 KT OR LESS. SEAS 8 FT IN MIXED 
NE AND SW SWELL.
.24 HOUR FORECAST WITHIN 90 NM OF 10N91W WINDS 20 KT OR LESS. 
SEAS 8 FT IN MIXED NE AND SW SWELL. WITHIN 90 NM OF 04N89W WINDS 
20 KT OR LESS. SEAS 8 FT IN SW SWELL. 
.48 HOUR FORECAST WITHIN 90 OF LINE FROM 07N92W TO 06N98W WINDS 
20 KT OR LESS. SEAS 8 FT IN SW SWELL.  

.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

CONVECTION VALID AT 2100 UTC THU JUL 20...

.LOW PRES 08N87W 1010 MB WITH TROPICAL WAVE TO 12N87W...SCATTERED
MODERATE ISOLATED STRONG WITHIN 240 NM W SEMICIRCLE OF CENTER. 

.LOW PRES 12N106W 1008 MB...SCATTERED STRONG WITHIN 90 NM OF
12N108W.

.TROPICAL STORM GREG...SCATTERED MODERATE TO STRONG WITHIN 180 NM
OF THE CENTER.

.TROPICAL DEPRESSION EIGHT...SCATTERED MODERATE TO STRONG WITHIN
75 NM OF 13N125W. 

.TROPICAL STORM FERNANDA...SCATTERED MODERATE WITHIN 120 NM OVER
THE NE QUADRANT OF CENTER.

.INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...
MONSOON TROUGH FROM 09N84W TO LOW PRES 08N87W TO LOW PRES 
12N106W.
SCATTERED MODERATE ISOLATED STRONG ELSEWHERE WITHIN 120 NM OF 
LINE FROM 06N88W TO 10N96W TO 11N103W.

$$
.FORECASTER NELSON. NATIONAL HURRICANE CENTER.